whenCapturedChangesInto values: allows a unit to change into a different unit when captured from a specific player to a specific player. "fromPlayer:toPlayer:transferAttributes:unitType:numberOfUnits". accepts "any" instead of a player name. allows multiple.
examples: <option name="whenCapturedChangesInto" value="any:any:true:Minor_Factory:1"/> and <option name="whenCapturedChangesInto" value="Russians:Germans:false:gold:3:lumber:1"/>

Currently, transferAttributes only transfers hit point and bombing damage from old to new unit.